Threshing machine



Y 1943. R. 'r. BECKMANN THRESHING MACHINE Filed Aug. 13, 1942 4 Sheets-Sheet 2 Inventor W Bee 7527247172 40132;. W mlyny 1943. R. T. BECKMANN 2,318,661

THRESHING MACHINE Filed Aug. 13. 1942 4 Sheets-Sheet 3 I m N I a W '1 Inventor w W724) ZBeckmamrz N &\

B 24mm WW 5m modified form of tailings rake;

Patented May 11, 1943 uNrrso STATES PATENT OFFICE Raymond T. Beckmann, Kiel, Wis., assignor of one-half to Roland E. Beclrmann, Kiel, Wis.

Application August 13, 1942, Serial No. 454,714

' (Cl. l.30-27) 5 Claims.

My invention relates to improvements in threshing machines more particularly, although not necessarily, of the so-called combine type.

By way of explanation, in practically all types of threshing machines, when the crop is heavy;

as with weeds, long green clover, alfalfa, and also from being over-ripe, the chafier will load up with a heavy layer of chaff and grain so that proper separation is not obtained and much good grain will be carried along with the chaff over the tailings rake to fall onto the ground and be lost. This condition is aggravated if air delivered by the fanning mill in the machine is properly regulated to keep the layer of chaff and grain nearly lifted or floating to provide for proper separation, the quantity of grain being lost increasing under such conditions.

Having the foregoing in mind, itis the principal object of my invention to equip threshing machines inexpensively with eflicient means'for' obtaining separation of the grain from the chafi under all conditions of the harvest, and which may be easily incorporated in present day threshing machines without necessitating extensive alterations in the basic structure thereof.

Other and subordinate objects are also comprehended by my invention, all of which, together with the precise nature of my improvements, will be readily understood when the succeeding description and claims are read with reference to the drawings accompanying and forming part of this specification.

In said drawings: Figure 1 is a fragmentary view in vertical longitudinal section of a threshing machine equipped according to my invention,

Figure 2 is a fragmentary view in horizontal section taken on the line 22 of Figure 1,

Figure'3 is a view in vertical transverse section taken on the line 3-3 of Figure 1 and drawn to an enlarged scale,

taken on the line 88 of FigureZ and drawn to an enlarged scale, p V Figure 9 is a view in perspective of a modified form of tailings rake, and

of another Figure 10 is a view intopplan' Referring to the drawings 'by numerals, my improvements have been shown therein as embodied in a well known type of threshing machine, conventionally illustrated as sufficient for the present purposes, and including the housing I forming the separating chamber 2. The housing contains the usual upwardly and rearwardly inclined vibratory straw racks 3 with the subjacent pan assembly 4 overlying the horizontal, adjustable upper chaffer 5 beneath which are located the intermediate and lower sieves 6, 1. In the bottom of the housing I at the rear end thereof and spaced rearwardly beyond the chaffer 5 and sieves 6, 1 is the tailings auger 8 operating in a transversely extending tailings trough 9 to return the tailings to the tailings feed spout, not

suitably secured at front ends thereof in a cross bar Msecured to the rear'end of the chafier 5 y by meansof pairs of upper and lower links l5 and bolts I6.

shown. Below the lowest sieve l is the grain In front of the chaifer 5 and sieves 6 and 'l is the cleaner fan'IZ operating to direct the air blast upwardly and rearwardly through the chaffer 5 and said sievesv and out of the rear of the housing I which, as will be understood, is open at its rear end.

According to-my invention, a tailings rake, or comb, is provided comprising a plurality of rodlike tines l3 extending in laterally'spaced parallel relation rearwardly of thechaifer 5 and. out of the rearend of the housing I. 'The tines [3 are The upper links :5, asbest-shown in Figure 8, likewise the lower links, are slotted, as at H, to accommodate bolts I6 and so that the rake 2 is adjustable forwardly and rearwardly of the chafier 5 into different set positions. tines The l3 are formed with intermediate downwardly and rearwardly extending sections l8 sub stantially at the rear end of the housing I which a form a grate-like prop in the tailings rake for a purpose. to be described. As best shown in Figure '7, each tine l3 has a short extension I!) projecting rearwardly above the sectionlB. and the purpose of which will presently appeaix;

' An elongated box-like bafiie' 20 extend 'horizontally and transversely across the housing I beneath the tailings rake and has'its endssuitably secured to the upstanding sides 2! of a subslots 21 into sides 2| of said yoke and through the sides of the housing I provide for securing the upper portions of the sides 2! tosaid housing. The yoke 22 is adapted for rocking adjustment forwardly and rearwardly on the trough 9 and to be clamped in different adjusted positions by the bolts 26 to vary the position of the baffles 20 relative to the tailings rake as desired. The bafile 2B embodies a straight rear wall 28 spaced forwardly of and closely adjacent to the described drop formed by the sections I8 of the tailings rake. This wall 28 together with the sections, [8 form the passageway in the rear of the bafile-ZU through which grain from the tailings rake may fall to find their way into the tailings auger trough 9.

Extending between the sides '21 of the yoke 22 and below the baffle 20 is a bafile plate '29 inclining upwardly and rearwardly from a point above the trough 9 past the drop forming sections l8 of the trailing rake. Conversely, said baflle plate 29 inclines downwardly and forwardly to direct grain falling through the passage between the wall 23 and sections I8 toward the trough 9.

As best shown in Figure 1, the yoke 22 extends well under the rear ends of the tines l3 and slants downwardly and forwardly to the trough 9 to catch grain falling from the rear end of the tailings rake and direct the same into the trough 9.

Hinged, as at 30, to the sides .2l of the yoke 22 directly below the bafiie 20 is a depending baflle .31 for partially closing, in variable degree, the

space between the bottom f the baffle 20 and ,the baffle-plate 29. Similarly hinged, as at 32, at .an upper front corner of the battle 2!] is another swingable, depending baffle 33 adjustable forwardly'and upwardly to variably close the space between the top of said baffle 20 and the front portion of the tailings rake. As will beunderstood, the baffles 3i and 33 extend clear across the yoke 22 and suitable detents, as represented ,blown out ,of the rear end of the housing. By

adjusting the. baffle 33 upwardly toward the tailings .rake the air blast against the chair and tailings after it leaves the chaffer may betco-ntrolled as occasionmay require. By adjusting the bafiie 3| downwardly and rearwardly to variably close the space between the bottomof the battle .20 and the bafile plate 29, theair blast against the rear portionof the tailings rake may be ,similarlycontrolledto prevent grain from being blown upwardly and rearwardly ofi said rake.

By virtue of the extensions [9 of the tines l3,the longer chair will be carried back furtherthan fine ohafitofacilitate escape of good grain from the chaff so that it may drop down behind the pattern.

In themodified form-of the invention shown in Figure 9 the tailings rake comprises a rectangular perforated plate 36' having rod-like tines 37 extendingfrom the rear edge thereof in laterally a spaced relation and providedwith front sections 38 similar to -sections, I8 and for the same purpose. Prongs 39 extend from the rear edge of vthe plate 35 in-lieu of the previouslly described extensions l9. This form of tailings rake is especially adapted for separation of small seed from the chaff Where the harvest is infested with heavy green weeds.

In the modified form shown in Figure 10, the tailings rake is formed of a perforated plate 48 having a central drop 4| and rearwardly extending prongs 42 corresponding to extensions I9 and prongs 39. This form of tailings rake is better adapted for very fine seed, as will be obvious.

The foregoing will, it is believed, suffice to impart a clear understanding of my invention without further explanation.

Manifestly, the invention, as described, is susceptible of modification in other respects than as heerin disclosed, and right is reserved to such modificationsas fall within the scope of the appended claims.

What I claim is:

1. In a thresher, the combination with a housing having an open rear end, a horizontal chafier spaced inwardly from said ends, tailings trough at the bottom and rear end of said housing, and a cleaner fan for directing an air blastupwardly and rearwardly relative to said chafferand out of said end, of a tailings rake extending rearwardly from said chaffer out of said rear end, and having an intermediate downwardly and rearwardly inclined drop extending across the housing, and means in said housing forming with said drop .a passageway for grain to drop through protected from said air blast to find its way to said trough.

2. In a thresher, the combination with a housing having an open rear end, a horizontal chaffer spaced inwardly from said end, a tailings .trough at the bottom and rear end of saidhousing, and a cleaner fan for directing an air blast upwardly and rearwardly relative to said chaffer and out of said end, of atailings rake extending rearwardly from said chaffer out of said rear end,.and. h avi ng an intermediate downwardly and rearwardly inclined drop extending across the housing, and means in said housing forming with said .drop a passageway for grain to drop through protected from said air blast to find its way tos aid trough, said means comprising anelongated ,box-likebaffie extending transversely of said housing beneath said rake and. spaced forwardly of said drop, andabaiile hinged to said first baffle-inadvance of said passageway for upward. swinging toward said rake to vary the .air blast against-said rake in advance of said passageway .and prevent grain from being lifted by said vblast off the rake in advance of the passageway.

3. In a thresher, the combination with ahousing having an open rearend, a horizontal chafier spaced inwardly from said. end, a tailings trough at the bottom and rear end of said-housing, and a cleaner fan for, directing an .air blast upwardly .and rearwardly relative to said chafier and out of said end, of a tailings rake extending rearwardly from said chafier out of said rearend, and having an intermediate downwardly andrearwardly inclined drop extending across the -.housi ng,eand means in said housing forming with said drop a passageway for grain to drop through protected ing having an open rear end, a horizontal chafl'er spaced inwardly from said end, a tailings trough at the bottom and rear end of said housing, and a cleaner fan for directing an air blast upwardy and rearwardly relative to said chafier and out of said end, of a tailings rake extending rearwardly from said chaffer out of said rear end, and having an intermediate downwardly and rearwardly inclined drop extending across the housing, and means in said housing forming with said drop a passageway for grain to drop through protected from said air blast to find the way to said trough, said means comprising a bafile extending transversely across said housing below said rake, an upwardly and rearwardly inclined baflle plate extending across said housing below said baflle and coacting therewith to direct the air blast upwardly against said rake in the rear of said drop to prevent heavy chafi from falling through the rear portion of the rake, and a depending bafiie hinged to said first bafile and depending from the same for swinging adjustment to vary the force of the blast directed upwardly against said rake.

5. A tailings rake for a threshing machine comprising front and rear parallel sections laterally offset in different planes, a transversely extending central drop portion inclining obliquely of the plane of the rake between said sections and joining the same and prongs overhanging said drop portion in the plane of one section.

RAYMOND T. BECKMANN. 

